Improvement in machines for polishing buttons



2 Sheets-Sheet-I.

P. CAHILL.

MACHINE FOR POLISHING BUTTONS. No. 174,896. Patented March 21,1876.

2 Sheets-Sheet Z.

P.CAHILL MACHINE FOR POLISHING BUTTONS.

Patented March 21,1876.

N. PETERS, FHOTO-UTHOGRAPHER, WASH NGTON D C against the periphery ofcarrier-plate o- 'polished rest upon the top of shaft 3 under UrvrrnnSTATES PATRICK OAHILL, OF LEEDS, MASSACHUSETTS, ASSIGNOR TO GEORGE P.

WARNER, OF SAME PLACE.

f IMPROVEMENT IN MACHINES PATENT Crrrcn,

FOR POLISHING BUTTONS.

Specification forming part of Letters Patent N 0. {74,896, dated March21, 1876; application filed February 25, 1876.

To all whom it may concern Be it known that I, PATRICK OAHILL, of Leeds,in the county of Hampshire and State of Massachusetts, have inventedcertain new and useful Improvements pertaining to a Button-Polishin gMachine, of which the following is a specification, reference being hadto the accompanying drawings, where- Figure l is a side view. Fig. 2 isa front view. Fig. 3 is a top view. Fig. 4 is a partial section on planeas m. Fig. 5 is a top view from plane at m. Fig. 6 is a detail view incentral vertical section of shaft 3 (hereinafter referred to,) modifiedfor certain purposes.

This machine is intended for polishing buttons of vegetable ivory orother proper material.

The lettera denotes the table of the ma chine; b b, uprights; 0, mainshaft; d, pitman from crank on main shaft giving vertical reciprocationto cross-head 6, bearing the punchdie 1''.

Pin 7; on disk 9 gives reciprocation to pivoted lever i, and, throughthe medium of connecting-rod k, to slide 1, on which is pivoted the pawlm, pressed forward by spring a which rotates on pin ptaking iutonotchesr, so as to give step-by-step rotation to the" carrier-plate, whichrests on plate 8, and contains the button-sockets it, into which thebutton blanks are fed, and, after being operated on, escape through thetrough or pipe u.

The carrier-plate is held locked at proper intervals to allow thebuttons to be operated on by the pawl v, pressed forward by spring to.This pawl is unlocked from its hold on the carrier-plate at properintervals,'to allow the stcp-by-step rotation, by the shoulder l onslide Z.

Under the table is hung the vertical shaft y rotating from shaft 2through the medium of gears a b. The lower hearing or step c for shaft yis upon plate d, underneath which is spring 0-, the purpose and officeof which is this: The buttons while being pressure of die f. Thesebuttons vary in thickness somewhat, even when out at first touniformity, on account of unequal expansion or contraction in subsequentdrying, and when a thick button comes under the polish-' ing operationthe spring 0 allows shaft y to give, and, to prevent breaking the buttonor straining the machine, the strength of the resistance of spring 6 isregulated by nuts f on bolts g. Nuts h hold plates d to properelevation.

Shaft 91 rotates continuously, and as the carrier-plate brings thebuttons one by one under operation over and upon the end of this shaft,the carrier-plate there stops for a proper interval, the punch-die fdescends and presses upon the button, and the upper end of shaft y beingroughened the button revolves with it, and thereby the upper face of thebutton is polished by rotation against the smooth face of the punch-die.The punch-die then ascends, leaving the button in its socket, and thebutton moves on.

If the button chance to adhere to the punch-die, it is detached by meansas follows: Inside the punch-die is the extractor'rod i pressed upwardby spring j As the punchdie commences to ascend, the vertical arm of thepivoted bell-crank lever j -carried on the cross-head-strikes againstbar is, pushing the lateral arm downward, and thereby causing theextractor to project from the punch-die, and so detach the adheringbutton.

I have found that buttons with full back and thin edge and flat, ornearly flat, top will not always readily move out of the die which is onthe top of shaft y, and when they do not they, are apt to be caught andbroken by the rotating carrier-block. To obviate this difficulty withsuch buttons, I construct the top of shaft y as shown in central sectionin Fig. 6, where y denotes the shaft in which is set the extractor mpressed upward by spring it, kept from rising too high by the cross-pin0 running through the mortise p, and from falling too low by theshoulder m abutting on the shoulder y.

I claim as my invention-- 1. In combination, the non-rotating die j,

the rotating die y, and the spring 0, substanplate 0, rotating shaft y,and extractor m all tially as described, and for the purpose setsubstantially as described, and for the purforth. pose set forth. 2. Incombination, the reciprocating die f, extractor i, and operating lever jall substantially as described, and for the purpose Witnesses:

PATRICK CAHILL.

set forth. H. K. PARSONS,

3. In combination, the rotating carrier- R0131. H. PEASE.

